http://creativecommons.org/licenses/by-sa/2.5/ schema http://swik.net/schema Sun, 09 Jul 2006 23:47:08 -0700 Sun, 09 Jul 2006 23:47:08 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/XML+Schema+Definition+Tool+%28Xsd.exe%29/cc616 Fri, 29 Aug 2008 21:59:07 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Stuff+Yaron+Finds+Interesting/cc6dz Some important best practices for using XML Schema. Use ANY - To make a schema extensible it must be possible to add new children to an existing element. As a rule all elements in a schema should be extensible. This derives from the general architectural principle "don't paint yourself into corners". As such throw in ANY elements everywhere. In the early W3C schema specs it was possible to just set an attribute on the schema that made everything extensible but unfortunately this feature was removed. An alternative is to use type substitution but this is a bad idea for protocols because type substitution only works if the processor has the extended schema which is usually never the case. Fri, 29 Aug 2008 15:59:04 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Stuff+Yaron+Finds+Interesting/cc6dx Mark Nottingham's article on XML Schema and Web Services is well worth reading. Of course I say that because I mostly agree with him. What I don't agree with Mark on is that RDF is the right way to go, but I am beginning to wonder if perhaps SDO is. Fri, 29 Aug 2008 15:59:04 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Stuff+Yaron+Finds+Interesting/cc6dv Writing a XML Schema is a challenge but as the first part of this document explains, writing a V2 schema that can accept V1 documents is in most cases impossible if you use XML Schema 1.0. In other words, if you want to write a backwards compatible schema you probably won't be able to do it using XML Schema 1.0. In an ideal world we would take the lessons learned from XML Schema and use them to start over, probably with RelaxNG. But until we can move over to a new standard we need a way to enable backwards compatible schemas to be written in XML Schema 1.0. Therefore the second part of this document explains how to use the XML Ignore Rule in conjunction with XML Schema 1.0 in order to create a validator that enables one to write backwards compatible schemas. The XML Ignore Rule can be best summarized as "if you don't recognize it, ignore it." Fri, 29 Aug 2008 15:59:04 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Stuff+Yaron+Finds+Interesting/cc6du In a previous article I explained why XML Schema 1.0 is incapable of implementing the XML ignore rule and why this means that validating multiple versions of the same document is impossible using XML Schema in the general case. In this article I look at RelaxNG and show why it can handle multiple version validation without a hitch. I then discuss how to use RelaxNG in the real world, including with Web Services and conclude that the time has come for the XML and especially Web Services community to transition from XML Schema 1.0 to RelaxNG. Fri, 29 Aug 2008 15:59:04 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Introduction+to+XML+Schemas/cc5u1 Fri, 29 Aug 2008 13:00:03 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Web+services+tip%3A+Representations+of+null+in+XML+Schema/cc49w Fri, 29 Aug 2008 09:59:51 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Create+a+maintainable+extensible+XML+format/cc4c5 XML is a communication format for exchanging structured documents and data. Too often, an XML format is chosen arbitrarily and on the fly during development, without much planning or design. Design the right XML format up front, and you can meet the needs of everyone involved in the communication. Fri, 29 Aug 2008 05:59:41 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/MetWare+screenshot%3A+propagating+XML+Schema+data+types/cc3lj Fri, 29 Aug 2008 02:04:41 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Easy+and+Efficient+XML+Processing%3A+Upgrade+to+JAXP+1.3/cc3a9 Fri, 29 Aug 2008 00:58:14 -0700 http://swik.net/json/del.icio.us%2Ftag%2Fjson/mnot%27s+Web+log%3A+Schema+for+JSON/cc2un One of the perceived deficiencies of JSON is that it doesn’t have a schema language. I say “perceived” because the problems that a schema language brings often outweigh the benefits; after all, look at the mess that XML Schema is in. Even that said, schemas are useful for documentation and QA. So, I’m finding the work that Robert Cerny has done very interesting; it’s basically schemas for JSON, in JSON (or very nearly so). For example, here’s the schema for the cerny doc format Thu, 28 Aug 2008 21:59:42 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Ten+XML+Schemas+you+should+know/cc2oc Thu, 28 Aug 2008 20:57:48 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/XML.com%3A+Using+W3C+XML+Schema/cc2el Thu, 28 Aug 2008 18:58:35 -0700 http://swik.net/MySQL/Planet+MySQL/The+Dangers+of+Having+status+fields/cc0hp Having a status column is very common in databases today. It can be used to denote a user status: CREATE TABLE IF NOT EXISTS `user` ( `user_id` int(10) unsigned NOT NULL auto_increment, `email` varchar(32) NOT NULL, `pw_hash` char(40) NOT NULL COLLATE latin1_general_cs, `status` enum('PENDING', 'ACTIVE', 'DISABLED') default 'PENDING', `date_created` timestamp NOT NULL default CURRENT_TIMESTAMP, PRIMARY KEY (`user_id`), UNIQUE KEY `idx_email` (`email`) ); or user-uploaded [...] Thu, 28 Aug 2008 18:05:40 -0700 http://swik.net/Hibernate/del.icio.us+tag%2Fhibernate/Custom+schema+generation+with+Hibernate+annotations+-+Java+World/ccz3w Thu, 28 Aug 2008 18:04:25 -0700 http://swik.net/xstream/del.icio.us%2Ftag%2Fxstream/RE%3A+XStream+in+Spring-WS+%7C+Namespace+suport%3F%3A+msg%2300001/cczb1 Thu, 28 Aug 2008 17:56:57 -0700 http://swik.net/XMLbeans/del.icio.us%2Ftag%2Fxmlbeans/Tutorial%3A+First+Steps+with+XMLBeans/ccy79 xmlns:xs="http://www.w3.org/2001/XMLSchema" Thu, 28 Aug 2008 17:55:35 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Binding+XML+Schemas+-+Data+type+mapping+from+xml+schema+to+java+type/ccub2 Java types to XML Schema Types and Vice-a-Versa Mon, 18 Aug 2008 14:06:24 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/SchemaSpy/cct4l Mon, 18 Aug 2008 13:06:36 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Ten+XML+Schemas+you+should+know/ccsbt Mon, 18 Aug 2008 03:06:27 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/home+%5BLiquiBase%5D/ccrnq Sun, 17 Aug 2008 21:05:58 -0700 http://swik.net/json/del.icio.us%2Ftag%2Fjson/JSON+%22+JSON+Schema+Proposal/cco2p Sat, 16 Aug 2008 19:13:11 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Preprocessor+Tool+for+XML+Schemas/ccouw Sat, 16 Aug 2008 17:11:38 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/XML+Schema%3A+Understanding+Namespaces/ccn43 XML namespaces explanation, very simple Sat, 16 Aug 2008 11:11:34 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/XML+Schema+Part+0%3A+Primer%3A+Introduction/ccn4u Sat, 16 Aug 2008 11:11:30 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/XML.com%3A+Using+W3C+XML+Schema+-+Part+2/ccmwu Fri, 15 Aug 2008 23:05:18 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/Improving+XML+Document+Validation+with+Schematron/ccmwm Fri, 15 Aug 2008 23:05:13 -0700 http://swik.net/W3C/Del.icio.us+W3C+Tags/XML.com%3A+Using+W3C+XML+Schema+-+Part+2/ccmwl Fri, 15 Aug 2008 23:05:11 -0700 http://swik.net/Eclipse/del.icio.us%2Ftag%2Feclipse/Mark+A.+Ziesemer%3A+Facelets+and+XSD-converted+TLDs+for+Eclipse/ccldy One strategy to get completion and validation working for facelets on eclipse: use WTP's xml editor for the xhtml files and assign xsd schemas for the JSF and Facelets namespaces. The author of this post provides the xsd files and shows how to set them up in Eclipse's XML catalog. The problem is that, at least on Eclipse 3.3, it doesn't seem to work. Fri, 15 Aug 2008 11:04:50 -0700 http://swik.net/XML/del.icio.us%2Ftag%2Fxml/XML+Schema+Example/cck4a Fri, 15 Aug 2008 09:05:31 -0700